



An explosion in the number and kind of commercially available hybrid trucks means battery power isn't just for lightweight commuter vehicles anymore
By Christopher Mims | April 20, 2009 | 12
Conventional refrigerated and utility trucks draw power from the diesel engine to power onboard electronics, but it's often more fuel-efficient to power these systems via batteries....[More]
Conventional refrigerated and utility trucks draw power from the diesel engine to power onboard electronics, but it's often more fuel-efficient to power these systems via batteries. (For instance, using stored energy to keep a refrigerated truck cool allows the vehicle's engine to be switched off when the truck is not in motion.)
Azure Dynamics's Low Emission Electric Power System is a "mild hybrid" electric system that provides power for these and other applications. (Mild hybrid means that the system is not part of the vehicle's power train, rather it powers ancillary electronics like a refrigeration system or a lift.)
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Coca-Cola Enterprises, a bottler and distributor, has the largest fleet of hybrid trucks in the U.S., with a total of 327 trucks. Roughly half the hybrid fleet consists of delivery trucks, which see significant fuel savings (up to 30 percent) when compared with conventional vehicles....[More]
Coca-Cola Enterprises, a bottler and distributor, has the largest fleet of hybrid trucks in the U.S., with a total of 327 trucks. Roughly half the hybrid fleet consists of delivery trucks, which see significant fuel savings (up to 30 percent) when compared with conventional vehicles. That's because they spend a lot of time stopping and starting in traffic, which allows them to take full advantage of regenerative braking charging their batteries. [Less] [Link to this slide]
Hydraulic hybrid refuse trucks built by Peterbilt, with power trains by Eaton, store energy recovered from braking as compressed hydraulic fluid, rather than electricity....[More]
Hydraulic hybrid refuse trucks built by Peterbilt, with power trains by Eaton, store energy recovered from braking as compressed hydraulic fluid, rather than electricity. Stored energy can then be used the next time the driver steps on the gas as a "launch assist," which takes some of the load off of the truck's diesel engine when it accelerates from a standstill.
In this image, the hydraulic hybrid system is highlighted in blue.
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Bucket (utility) trucks with hybrid–electric power trains achieve all the efficiencies of conventional hybrids (such as increased fuel efficiency through regenerative braking) and also have a another advantage: the trucks can be turned off when only the bucket lift is being used....[More]
Bucket (utility) trucks with hybrid–electric power trains achieve all the efficiencies of conventional hybrids (such as increased fuel efficiency through regenerative braking) and also have a another advantage: the trucks can be turned off when only the bucket lift is being used. This allows up to two hours of continuous lift operation, after which the diesel engine automatically switches on and recharges the vehicle's batteries within five minutes. [Less] [Link to this slide]
Electric Vehicles International makes hybrid–electric and fully electric trucks, and claims to have the first road-ready all-electric truck available in the U.S....[More]
Electric Vehicles International makes hybrid–electric and fully electric trucks, and claims to have the first road-ready all-electric truck available in the U.S. EVI takes the somewhat unusual step of leasing rather than selling its users the batteries in its vehicles. Most of the 2,000 trucks it has shipped to date are used in Mexico. [Less] [Link to this slide]
FedEx was an early adopter of hybrid trucks, and until 2008 could boast that it maintained the largest fleet of hybrid electric vehicles in North America....[More]
FedEx was an early adopter of hybrid trucks, and until 2008 could boast that it maintained the largest fleet of hybrid electric vehicles in North America. (That crown was passed to UPS in May 2008, when it ordered 200 hybrid trucks, and then to Coca-Cola Enterprises in January 2009, which boosted its fleet to a total of 327.) FedEx currently maintains a fleet of 170 hybrid trucks that has racked up more than 3.5 million miles (5.6 million kilometers) of service. [Less] [Link to this slide]
President Obama stands in front of a plug-in hybrid Ford F-550 "trouble truck" that was jointly developed by the Electronic Power Research Institute, Eaton Corp....[More]
President Obama stands in front of a plug-in hybrid Ford F-550 "trouble truck" that was jointly developed by the Electronic Power Research Institute, Eaton Corp. and Ford. The vehicle is currently being tested at Southern California Edison, one of over 30 utilities supporting this program. Speaking with Obama is Ted Craver, president, CEO and chairman of Edison International, the utility's parent company. [Less] [Link to this slide]
The U.S. Department of Defense, the world's single largest consumer of liquid fuels, has worked with companies such as Oshkosh Corp. to develop hybrid versions of many of its vehicles....[More]
The U.S. Department of Defense, the world's single largest consumer of liquid fuels, has worked with companies such as Oshkosh Corp. to develop hybrid versions of many of its vehicles. Oshkosh's Heavy Expanded Mobility Tactical Truck with the ProPulse diesel–electric drive system not only saves fuel, it also "serves as an onboard AC electric generator with enough output to power an entire airfield or hospital," according to the company. [Less] [Link to this slide]
The largest trucks on the road, so-called "class 8" trucks, with a gross volume weight of 33,000 pounds (14,950 kilograms), have been among the most challenging vehicles to hybridize, mostly because of the way in which they're used for long hauls on highways: Absent the frequent stops and starts of city traffic, the regenerative braking of a hybrid–electric power train doesn't have many opportunities to recover energy and improve fuel efficiency....[More]
The largest trucks on the road, so-called "class 8" trucks, with a gross volume weight of 33,000 pounds (14,950 kilograms), have been among the most challenging vehicles to hybridize, mostly because of the way in which they're used for long hauls on highways: Absent the frequent stops and starts of city traffic, the regenerative braking of a hybrid–electric power train doesn't have many opportunities to recover energy and improve fuel efficiency.
That hasn't stopped discount retail chain Wal-Mart from testing hybrid class 8 trucks, purchased from both Peterbilt and ArvinMeritor. Wal-Mart is currently testing how these rigs operate on a range of fuels, including reclaimed grease fuel from Wal-Mart and Sam's Club stores. As with any new technology, they want to test real-world performance.
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Andrew Frank [ far left ], a professor of mechanical engineering at the University of California, Davis, who is widely credited with inventing the plug-in hybrid vehicle, is currently collaborating with the U.S....[More]
Andrew Frank [far left], a professor of mechanical engineering at the University of California, Davis, who is widely credited with inventing the plug-in hybrid vehicle, is currently collaborating with the U.S. Department of Defense to develop a plug-in delivery truck for use on military bases. His ultimate goal, he says, is to power these vehicles from renewable energy generated on-base, such as from arrays of solar panels similar to the ones in this photo. [Less] [Link to this slide]
The Terex Commander 4047 by Dueco, with a hybrid power train by Odyne, is a plug-in electric hybrid with an all-electric mode suitable for low-noise operation on a drilling site....[More]
The Terex Commander 4047 by Dueco, with a hybrid power train by Odyne, is a plug-in electric hybrid with an all-electric mode suitable for low-noise operation on a drilling site. (Most of the noise from a truck of this kind comes from its diesel engine.) [Less] [Link to this slide]
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12 Comments
Add CommentThis is very smart thinking. People dont realize it, but improving 9mpg to 12 mpg is as cost effective as taking a car from 30 mpg to 50mpg... honestly, do the math!
Reply | Report Abuse | Link to thisThis tech will best work on med duty trucks in city use. Hydraulic hybrid has the best bet, but elecric has some hope too. The electric hybrid has no hope if c credit caps on coal fired electric happins.
Reply | Report Abuse | Link to thisLong haul big trucks will take better engine design, the math does not work over the distance, sorry hybrid is most effective in stop and go driving conditions.
We can use the same kind of solar concentration tech used in the boiling salt plants in Spain. We have to stop using coal period. Hybrid tech can be used on long distance or short look at how train locomotives work, the diesel electric system has been around a long time now. We even use the same kind of diesel/electric set up on ships as large as aircraft carriers their main systems are nuke (which we still have the problem of spent fuel disposal) but they also have backup diesel electrics, I served on a nuke carrier.
Reply | Report Abuse | Link to thisWe can use the same kind of solar concentration tech used in the boiling salt plants in Spain. We have to stop using coal period. Hybrid tech can be used on long distance or short look at how train locomotives work, the diesel electric system has been around a long time now. We even use the same kind of diesel/electric set up on ships as large as aircraft carriers their main systems are nuke (which we still have the problem of spent fuel disposal) but they also have backup diesel electrics, I served on a nuke carrier.
Reply | Report Abuse | Link to thisI meant the use of solar concentration for stationary power production/recharging..sorry for the duplication I don't know how/why that happened.
Reply | Report Abuse | Link to thisGreat job :)
Reply | Report Abuse | Link to thisWe are in the right way
Reply | Report Abuse | Link to thisBig trucks ought to be the easiest, actually, to convert to hybrid. The point is to decouple the mechanic (actually oleodynamic) transmission between the diesel engine to the wheels and replace it with the combo alternators / electric engines. Adding batteries is a way to recoup energy from braking and add it during acceleration, or for use when taxing in confined spaces. In practice this is the same power train of diesel-electric locomotives for long haul freight trains. It is far easier to fit electric motors on large beasts like that than in small cars - it has also the bonus of all-wheel drive and powerful braking.
Reply | Report Abuse | Link to thisThemain benefit of this arrangement is that the internal combustion engine can be optimised for maximum efficiency. For example, we might put very compact motorbikes engines, running at high rpm, and still have very high torque through the electric engines. More sensibly, conventional diesel/petrol engines should be replaced by very efficient two-stroke turbocharged diesel engines - again, as in locomotives.
In fact, the present powertrains arrangements are a legacy technology that could and should have get rid of at least 15 years ago, given the advance in automotive electronics. Fiscal regimes have encouranged energy waste and create disincentives to invest in new manufacturing lines and perpetuate an anachronistic technology. It has been the same nonsense as in the UK, which kept building piston steam train engines till the 1950, when they could have been used - at least! - steam turbines since the 1900s.
This is awesome. It is wonderful that we are finally here and in so many heavy-duty industrial applications. Green tech will finally get in the green in 2009. Dare I say could lead our recovery. Could a green tech bubble be hatching? I hope so. Keep your eye on the markets.
Reply | Report Abuse | Link to thisThe diesel engine of the bucket truck can charge the batteries in five minutes? This can't be right. High speed recharging in about the time it takes to fill a tank of gas would by be a major technological breakthrough that would change battery use everywhere.
Reply | Report Abuse | Link to thisi hate white people
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